October 2023 - Page 4 of 4 - Study notes, tips, worksheets, exam papers

State the properties of magnets

30/10/2023 at 5:37 pm (last edited 30/10/2023 at 5:37 pm)

When a magnet is suspended freely, it will come to rest in a North-South orientation.
Unlike poles attract.
Like poles repel.
A magnet is strongest at its poles.

Define Faraday’s Law of Electromagnetic Induction

30/10/2023 at 5:22 pm (last edited 30/10/2023 at 5:22 pm)

Faraday’s Law of Electromagnetic Induction states that the electromotive force induced in a conductor is proportional to the rate of change of magnetic flux linkages through the conductor.

(Memorise it! It is useful when trying to explain the effects caused by Faraday’s Law)

Define Lenz’s Law

8767 admin

30/10/2023 at 5:13 pm (last edited 30/10/2023 at 5:13 pm)

Lenz’s Law states that the direction of the induced e.m.f. and hence the induced current in a closed circuit, is always such that its magnetic effect opposes the motion or change producing the induced e.m.f.

(Memorise it! It is useful when trying to explain the effects caused by Lenz’s Law)